The TriggerPoint GRID Foam Roller is the original hollow core foam roller, built to be more sturdy and stable for the most intense rolling sessions. A hard core sits within this multi-density foam roller, which uses different zones of pressure to simulate an actual sports massage. Being able to get a dynamic, deep tissue massage from a foam roller promotes circulation to speed up recovery and relieve muscle pain and tightness. Recommended by trainers and physical therapists alike, it needs to be in the collection of any athlete!